Rockpi4c cannot boot from emmc

Development and Programming
1

I bought the brandnew rockpi4c, and try to boot from emmc.(Android9)
But, it cannot boot up. and led :green ON , blue blink twice (/ 1second).
I tried the SPI flash

  • sudo rkdeveloptool db /path/to/rk3399_loader_spinor_v1.15.114.bin

    output: Downloading bootloader succeeded.

  • sudo rkdeveloptool wl 0 /path/to/rockpi4c-uboot-trust-spi_2017.09-2692-gdf20631bd8_20200824.img

    output: Write LBA from file (100%)

  • reboot the rockpi4c (maskrom mode, )
    sudo rkdeveloptool rd

will output: Reset Device Failed. <<<< ???

I tried this process several time, but,
What should i do?

2

I missundstood.
“Reboot the device” is just exec the command “sudo rkdeveloptool rd”, it is not power on/off of rockpi4.
As the result of this action, “Reset Device OK” is displayed.
But, still now, rockpi4 cannot boot from emmc.
Plaese help me.

3

can you test the latest android 10 with the guide from this thread:

4

Thanks for your support.
Yesterday, I confirmed 4/5 pcs of rockpi4c coud boot up from emmc(Android 10).
But, this 1/5 pcs of rocpi4c cannot boot still now.
I followed your guide (windows), but I cannot load the downloaded image file.

The process is followings.

  1. Boot rockpi4c in maskrom mode.
  2. Flash the fw by AndroidToolsV2.3. (Windows)
5

Tonight, I cannot erase the SPI by windows tool by this problem.
But I tried to erase the SPI using linux pc (raspberry-pi).
And I can success to erase the spi.
After that, I can success to boot the Android 10.
Thank you.

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